To Hide an Entity On the Fly
Hiding operations are object-action oriented only. You must select the item you want to hide or redisplay before you choose Hide or Unhide.
1. In the Graphics window or the Model Tree, select and then right-click the item you want to hide.
2. On the shortcut menu, click Hide. The selected item or items are blanked from the display. Their icons in the Model Tree are dimmed to reveal their hidden status.